Alarm



(No Model.)

Patented Aug. 13, 1889. @l

L .715d im IIlllllllllll l! Illllllllllilf1 2 Sheets-Sheet 2.

(No Model.)

G. M. WILLIAMS.

ALARM.

Patente-d Aug. 13, 1889.

N. Pnzns. Phew-mhugnpm. wmmngm n. c.

UNITED STATES PATENT OFFICE.

GXVILYM M, WILLIAMS, OF VILKES-BARR, PENNSYLVANIA.

ALARM.

SPECIFICATION forming part of Letters Patent No. 409,088, dated August13, 1889.

Application tiled February 4, 1889.A Serial No. 298,624. (N0 model.)

.To all whom it may concern:

Be it known that I, GWTLYM lvLWiLLIAMs, a citizen of theUnited States,residing at Vilkes- Barr, in the county of Luzerne and State ofPennsylvania, have in vented certain new and useful Improvements in anElectric Alarm Attachment for Pressure-Gages, of which the following isa specification.

This invention relates to an electric alarm attachment for pressuregages, and is designed especially for use upon gages of that classembodying an oscillating or partiallyrotatable indicator.

The object of the invention is to provide a device of this characteradapted to sound an alarm when the pressure passes beyond a desiredlimit, whether it be greater or less than said limit.

A further object of the invention is to provide means for adjusting thedevice to regulate the points at which the alarm may be sounded.

A further object of the invention is to provide an electric alarmattachment of this character adapted to be thrown in or out ofoperation, as desired.

A further object of the invention is to provide a simple and improvedelectric alarm of this class which will possess advantages in point ofinexpensiveness, durability, and general eiiiciency.

In the drawings, Figure l is a perspective view of a pressure-gage,showing my electric alarm attachment applied thereto. Fig. 2 is a sideelevation illustrating the circuit-closer thrown out of operation. Fig.3 is a top or plan view. Figs. 4t and 5 are detail sectional views atright angles to each other, taken through the circuit-closer andadjacent parts of the gage, the latter view illustrating the manner ofinsulating the circuit-closer. Fig. 6 is a detail perspective view ofthe circuitcloser. Fig. 7 is a detail perspective view of amodification.

Corresponding parts in the figures are denoted by the same letters ofreference.

The present invention is herein shown as applied to my newly-inventedpressure-gage, for which application was filed November l5, 1888, SerialNo. 290,891. The latter comprises, brieiiy, a casing A, provided with apressure-actuated diaphragm, (not shown,) and a casing B, mounted uponthe top a ofthe casing A. A shaft O is mounted in the casing B andprojects therefrom, said shaft being connected with the diaphragm bysuitable mechanism, and is oscillated by the movement of the diaphragm.Upon the outer end of the shaft is mounted an indicator c, or

a recording-arm, (illustrated in Fig. 7,) adapted to carry a pen orpencil for recording the pressure and time upon a chart providedtherefor,

Upon the top of the casing is secured my improved circuit-closer D, aplate E, of hard rubber or other insulating material, being interposedbetweenthe two. This circuit-closer comprises a plate d, preferablysecured to the gage by screws passedthrough perforations d d providedtherefor in said plate. The screws are insulated by blocks d2 cl2, alsopreferably of hard rubber and having reduced cylindrical portions, whichproj ect through the perforations d', said blocks being each providedwith perforations through which the securin g-screws pass. Completeinsulation between the circuit-closer and gage is thus secured.

To the rigid plate d is hinged a plate F, which, when the alarmmechanism is in use, rests upon the plate E, the latter being ofsufficient size to accomplish this purpose. The plate F is provided atits ends with correspondin g upwardly-proj ecting lu gs f f, havinghorizontal oppositely-disposed screw-threaded perforations f f for thereception of adjustable opposing thumb-screws G G, the inner opposingends of which arey preferably pointed, as shown.

H designates a plate, preferably formed of spring metal,which projectsdownwardly from the indicator c, or from the shaft C, and between theopposing ends of the screws G G. This plate is carried by the shaft inits movement, and has free play within the limit allowed by theadjusting-screws. By reason of its spring action,when the plate comes incontact with one of the screws, it yields to further pressure in thatdirection, but remains in contact with the screw.

Upon the gage and plate are disposed binding-posts I I, of any suitableconstruction, which are connected by wires in the usual manner with abattery J and with a bell K or IOO fs llegase other alarm111eel1a11isn1. ln addition to the hell K, I prefer to employ one orinore hells L, situated at desired points and eonneeted with the polesof the battery h vhranehwires. By the employment of this additionalalarm ineehz'tnisnn should the eireuit through any ol. the bellsl1eeo111e broken the remaining ones will sound an alarni.

The operationand advantage'sof in v invention willhe readilT understoodhy those sli illed in the art to which it appertains. 'lhe degree ofpressure ahove or below the 11or111al oraverage pressure atwhieh it isdesired tohavethe alarm sounded is regulated h5' the adj ustinent o' thetl1u1nl1-se1'ews. 'W hen the pressure l1eeo111es greater or less thanthe liinit to whieh the serews have heen adjusted, the plaie ll Goinesin eontaet with one of the serewsavhieh forms a Complete eireuit throughthe gage and eireuit eloser, and an alarin will he sounded until thepressure heeoines greater or less, as the ease ma)Y he, and theeontaetof said plate and the serew broken.

lVhen an operation of the gage is desired independentof the alarni,theplate lf isthrown hack, removing the Circuit-closer t'ron1 anjvYpossible Contact with the plate li.

l elaiin 1113'v inventionm l. ln an eleetrie alarm ii'or pressure-gages,the Combination,with a rigid plate, ot'a plate hinged thereto, providedwith upwardly-projeeting Corresponding lugs disposed at eaeh` endthereof, and having opposing eo11iaet points, suhstant.iall \v as andt'or the purpose Set forth.

In an eleetrie alarn1 'or pressure-gages, the Combination, with a rigidplate, olf two eorrespo 11 ding lugs pivotal ly eonneetod therewith andprovided with opposing arfljustahle screws Vforming Contact-points,substantially as and for the purpose set forth.

El. The oenihination, with a pressure-gage provided with 'an oscillatingYindieatorsshalft and a plate projecting downwardly troni the latter, otan insulated eireuit-eleser eo1nprising a rigid plate, lugs pivotall)Yeonneeted therewith, 1 1rojeeting at each side thedownwardly-preieeti11g plate and provided with cfontaot-lwints torengage111e11t hy the latter, said ei reuit-eloser hein g adapted to bethrown '111 or out oli' operation, and llattery and alarm mechanismeonneeted hy wires with the shaft and eireuit-eloser, suhstal1tiallgyYas sei lj'orth.

l. The Combination, wilh a pressure-gage lnfovided with an oscillatingindif'ator-shai't and a plate projeeting iflmvnu'ardlv from the latter,ot` an insulated eireuit-eh1ser eonipris ing` a rigid plate and a platehinged thereto provided with two eorrespomli11g lugs projecting at eaehside the dowuwaidly-projem ing plate, o] 1]r1osing adjustable serews provided through thelugs,a1nlfl1atteryandalarin nieehanisin Connected bywires with 1l1e shatl and eirei'iit-eloser, suhsiantially as set t'orth.

ln testimony whereotl'ailix inv signature in presence ot two witnesses.

W'itn esses:

'l1 Il.. Satvnow, li. W. 11111111111.

